Bartender is attentive and friendly and funny. It was my second time in here with my husband. Both times, we felt welcomed with the warmth I imagine being reserved for regulars. Beers on tap are diverse and good selection. Multiple screens to be able to watch many sporting events simultaneously.

Wowed I can't believe Gabby is so amazingly done her join plus the bar had so amazing attitudes for their clients.. beautiful and cleans as I can mentioned it

Standard Irish Pub Surprisingly for an Irish pub - they did not have an Irish Red Ale - head scratcher Good location for a quick drink and chat The cute bartender knew how to pour a perfect Guinness :) 4 stars !!

Great ambiance great vibes. Great place to chill with the lads in downtown San Mateo. Parking a little tricky but there are a few lots nearby. The Guinness was tasty shoutout to Monica! Dope bartender will be coming back

This is a fun no frills Irish bar with tons of regulars. Enjoy trivia on Wednesday nights at 8pm, or come in for a weeknight Guinness. Sometimes there's a food truck out front, or you can visit George's next door and they will bring it over to you. You can also bring in food. My favorite is the Calisqueeze on tap.

We came on a Saturday and it was a super fun karaoke night. The energy was up and the crowd was vibing. Beers were only about $6! A must come for a quick drink or even a night out

Stumbled upon O'Neill's Irish Pub after dinner in downtown San Mateo when my friends and I were looking for a second location to keep the night going. Lucky for us, it just so happened to be karaoke night (Saturday at around 9 PM)! They checked our IDs at the door and we settled at one of their larger tables for our group of 8. As some of our group went up to the bar to get drinks, they got started on the music. I appreciated that the DJ started the karaoke night off with group songs. They had so many mics and were handing them out to the different groups so everyone could sing along from their tables. After 3-5 group songs that everyone loved and could sing along to, they started to take requests for solo singers. It was fun to see individual singers go up to their "stage" area to sing their songs of choice. Now, I will say, the crowd and vibe was more of a rap/hip hop/alternative rock karaoke with a couple 80s/90s pop songs sprinkled in between. So... if showtunes or ballads or current pop is more your vibe, might have to check out another bar. Or maybe it was just the crowd that night. Either way, it was all a great time and everyone was having fun. No one was being sloppy or annoying and the DJ kept the party going. A great bar if you're a large group looking for plenty of seating and good drinks!

Pretty standard Irish pub with a good selection of beers on tap and friendly staff. The main highlight of this place is the Wednesday Night Trivia nights, which has been my favorite trivia in the area this far! One downside is cleanliness, especially in the bathrooms (I don't know who thought putting the toilet in the same open room as the urinal stalls was a good idea, but it was certainly not).